Andrew knobel



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' fami@ ANDREW KNOBEL, OF MONROE, WISCONSIN.

Lettere Patent No. 76,203, dated March 31, 1858.

IMPROVEMENT IN HOT-AIR FURNAGES.

dige Srlptnle'nftmt tt tungen ttttnt rtnttinn entiteiten rf the sulla.

TO ALL Tr'HOM 1T MAY CONGERN:

Be it known that I, ANDREW KNOBEL,ot` Monroe, Green county, Wiseonsimvhave made certain new and useful Improvements in Heating-Furnaces; and I do declare that the following is afull, clear, and exact description of the construction and operation of the same, reference being' had to the accompanying 'drawings making part of this specification, in which- Figure 1 represents a. vertical'section.

Figure 2, a horizontal section on red line in fig; 1, marked 2 2.

Figure 3, a horizontal section on red line marked 3 3.

Figure 4, a horizontal section ,onY red red line marked fl vFigure 5, a horizontal section on red line marked 5 5.

Like letters refer tolike parts in all the figures.

The nature and object ofl my invention consist in constructing a heatingffurnace so as .to more perfectly 'consume thefuel and-utilize the heat generated; in making provision for keepingr the hearted air moist; in pro'- viding-a. gas-burner of peculiar construction above the `tire-pot; in the peculiar construction and arrangement of the passages and chambers for heat and air; and in the several devices Vand combinationsv hereinafter fully set forth.

To enable others skilled in the art to make and use vmy invention, I proceed to describe its construction and operation.

`In the drawings, a represents the ash-pan et', mouth of ash-pit; a, four supports on which crests. The

ash-pan has a regula-tor or door'attached for regulating the air to he consumed. The pan maybe illed with p water, as shown in fig. 1; lThe water, becoming heated, cvaporates rapidly, and the'vapor ascending through the grates, and being mixed with fresh air, causes a thorough combustion. The'fuel is placed-on theigrate b. e is .the lire-pot, the opening to whichis closed by the door c. cfis the connection between the tire-pot and the wall or enclosure'. Ab'ove the door or opening c is a narrow air-passage, which conveys, in tinestreams, hot air to` the gas-burner elabove the fuel. This passage is provided witlra door or regulator in front. The gas-burner e consists-of ay cylindrical basin suspended above the fireplace, asshown in,tig.,1, mauufactured of suitable metal, and provided with a number of perpendicularly-arranged plates, an d the spaces between the plates should together have greater capacity than the smoke-pipe j. fis a cylinder, above and resting upon the gas-burnere, through which the products of combustion are conveyed-to the smoke-passages. g represents vertical pipes, as shown in tig. 3, which pass through the plates fr x, connecting them. together, and forming passages through which air enters the furnace. trepresents other vertical pipes or air-passages, similar to g, and located above them, passing through and connectingthe plates rol/'wm'. The central pipe h is made removable, for-thepurpose ofcleaning,V

when necessary. c' represents the pipes through which the smoke is conveyed from the body.ot` the furnace into the escape-pipe j, which is connected with the chimney. The diameter of this pipe is' onethird the diameter of the grate b, and itdis provided with a regulator or damper, and a door for cleaning the pipe-j outsideof the wall y. The passage for the` smokepipe j between the cylinders s and t is closed around the opening by a separate pipe, somewhat larger than j. 7c is an annular plate, provided with annularianches, to which the cylinder f andplate w' are connected; and by which the tire-pot and smoke-passages are entirely separated and cut oli` from the air-passages.v That portion of the furnace containing the air-tubes and cylinders is supportedby the pillars m. Watcr-tubs n, provided in front with a funnel and cock,`rest on iron rails.. o-is a conical plate to convey the products of combustion to the spaces Vbetween the pipes g, and to prevent the passageof the smoke int() the air-chambers: o' is a bar supporting the inner endet' the pipe q representscover's over ports, for cleaning the smoke-passagest t" s s". The smokefpassage tf can be cleanedfthrou-gh the-.doer r. s s are two cylinders or cylindrical sections. s rests on plate aq, and s. rests on the upper edge of's. The plate rr" is supported,V

by s". The two plates x :1; and the cylinders s s" form a large space, cavity, or chamber, A, in which to heat a large volume of air, which is heatedpartly'bylthe heat in the smoke-passages surrounding thecavity or 'chamber A, and partly by the pipes z' andjwhichpass through the 'chamber-A. t tt.t" are large cylinders standing one upon another, and surrounding thewholeof the apparatus above the plate and, with the cylinders s s, forming smoke-passages, as shown. Together, they form the surrounding of the smoke and air-passages, and also form a heating-surface to heat the air between them andthe walls y. These cylinders, as well as cylinders s' s" and the pipes g and` L, are provided with ribs or projections or corrngntions, to enlarge the heatingsurface. u e are openings through the walls y, tig. 2, which continuously supply the apparatus with fresh air. These openings can-hens numerous as may he desired. yThey should be provided with regulators, and their capacity should equal one-twentieth of the heating-surface. 'w w are the inner ends of the openings e a. is a base-plate, on which the cylinders t t. 15"151 rest,1as shown, this plate is supported on pillars m, and is connected with plates x by the pipes gwhich support it. fr" is the plate on which tlc cylinders erest. 2;is'a plate resting on'cylinder s, and perforated by the openings y, 4air-pipe t, and smoke-pipes z'. zum is anupper plate` resembling ar, and perforated by openings 7L q. y y is an enclosure, of common brick, enclosing the l apparatus, and at proper distance therefromLbut it should be so far away that a current will he created in thc space, utilizing the heat of the outside surface ol the apparatus. 'e is anoutlet for the nir after it has been heated. Eachoutlet should he providedwith a regulator, and thecapacity of the ohtlcts should b e in the aggregate 'a little larger .than the inlets 1i w. 5

The iiesh-coloring in the drawings shows the air-currents, the white shows the smoke-currents. The sections cut through iron are colored blue, the hrich-work red. Y y

The furnace may be made of cast or sheet iron, or other suitable material, and the several parts .maybe cemented together wi'illany .suitable composition.' When made of either ina'terial, the furnace will be made in cylindrical sections,`as shown.

It .will he seen that the cylinders s and t" can he removed, and .the uppenone, 15, with its ilues and pipes, attached to cylinders s und t, and {it without any change in any oi' the remaining cylinders, and thereby materially reduce the heightl of .the furnace. Additional lones can also be inserted, so'as -to increase its height andadapt it to the height of any basement or place Where it is to be used, and all of these changes in height and capacity can be produced without any change of construction or of patterns, which is of great-advantage,

particularly when made of cast iron, and of great convenience in adapting itl to diierent locali-ties.

A.In use, the fire is made in the usual manner. Air riray then he admitted to -the'irc-chaxnher through the v passage d, to aid the combustion of the gases in the gas-burner e. An intense heat will be formedat this point,

the burner Awill become vred het, a rapidourrent of airwill he produced, and smoke and gases will'be thoroughly v consumed. The heat and unconsuincd products pass into the -smolzcchainber immediately above the cylinderf, and, finding their nay around the air-passages g, pass into the smolreipassage between the outer-cylinder t/ and S 8". l Thence, they pass into the upper ksmoke-chamber, and, theref'nding their way through the yspaces varound' the air-passages It, they pass downwards, through the pipes z'iinto the outleepipe juas indignd .by the arrows.

. Currents of air entering at the openings v, pass, intothe apparatus, and through all the air-passages therein,

andvalso around the apparatus to theepeninge, taking up nearly all the heat generated, and by'means of the peculiar arrangement et'` the passages for heatand` air, nearly all the heat is utilized. AThe air is rkept moist by f means of evaporation from the reservoirs n, and a supply of hot wuterisfa'lso provided. I

A water-reservoir.might beso placed that one end would project into the'lspuce above the burner e, and there be in Contact with the dames: A great quantity ofhot water eouldthus be obtained, vor steam could be' made for heating purposes. i

- What I claim as my invention, and desire to secure by Letters Patent, 'isl. Providingftheash-pitiaand fire-box c ywith linedv openings a c extending through tlie'outer wall, suhstantially as specified.

2. ,The suspended gas-burner e, constructed and'operating substantially as specified. f

r3. Construetingfthe furnace in cylindricalsections,so arranged that the middle sections swan'drtmmaybe removed or others added, withoutchanging the otherfsections, substantially as specified.

4. Supporting the chamhered and ilued portion of the furnace zipon thepillars m, and the combustion portioniupon the pedestals a, as described, so that theieombustion port-iena ande may hefrernored or `replaced without disturbing the heating portion.

f5.v The small central chamberf, located imniediately above 'the gas-burner e and nre-box c, 'for' burningthe.

unconsumed products of thejre below, and provided with side openings at thetop, door?, und conical inverted plate o, substantially as' specified.

6. The combination andarrangeinent of the iire-liox e and gas-burner e, with the cylindrical sections t t t" t'Hand s s, divided and supported by the horizontal plates se" az x x, substantially as' and for the purposes specified.

ANDREW KNOBEL. Witnesses:

L. L. Bonn, E; A.- WEST. 

